Ulsan National Institute of Science and Technology · Engineering
Professor Namhun Kim's research lab specializes in advanced manufacturing technologies, with a strong focus on additive manufacturing (3D/4D printing), smart materials, and intelligent process optimization. The lab explores innovative applications of shape memory polymers in 4D printing, develops decision-support tools for multi-objective process planning in AM, and investigates defect detection using data-driven methods such as KNN with dynamic time warping. Additionally, the lab contributes to the advancement of multi-phase electric drives and the quantification of manufacturing complexity in mixed-model assembly systems.
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Additive manufacturing (AM) became widespread through several organizations due to its benefits in providing design freedom, inventory improvement, cost reduction, and supply chain design. Process planning in AM involving various AM technologies is also complicated and scarce. Thus, this study proposed a decision-support tool that integrates production and distribution planning in AM involving material extrusion (ME), stereolithography (SLA), and selective laser sintering (SLS). A multi-objectiv
Abstract 3D printing of smart materials, called “four‐dimensional” (4D) printing, adds active, responsive functions to 3D‐printed structures. Shape memory polymers (SMPs) can be employed as an active material in 4D printing, and this could be useful for a wide range of potential applications. New design for 4D printing is presented here by introducing SMPs into rotational multistable structures. Two different digital SMPs are employed to enable large‐angle, thermal actuation in a controlled mann
In this paper, improved direct torque control(DTC) of five-phase induction motor(IM) is proposed. Due to the additional degrees of freedom, five-phase IM drives present unique characteristics. One of them is the ability of enhancing the torque producing capability of the motor. Also five-phase motor drives possess many others advantage compared with the traditional three-phase motor drives. Such as, reducing the amplitude and increasing of frequency of torque pulsation, reducing amplitude of cur
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